The line runs from CP Port Reading Junction in Manville to Oak Island Yard in Newark.

The line later expanded all the way to Buffalo, New York and then to Jersey City which was later retracted to Newark.

The original Lehigh Line was inherited by Norfolk Southern Railway in 1999 but it did not include the Manville to Newark tracks.

The original Lehigh Line lost its existing tracks from Manville to Newark when Norfolk Southern Railway acquired it in the Conrail split with CSX Transportation in order for both Norfolk Southern and its competitor CSX to have equal competition in the Northeast.

Norfolk Southern along with its competitor CSX own the new rail line under a joint venture called Conrail Shared Assets Operations; the joint venture is the same company that operated the former Conrail railroad, just reorganized as a terminal railroad under Norfolk Southern and CSX ownership.

Norfolk Southern Railway and CSX Transportation are the only Class 1 railroads that operate on the East Coast.